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Updated: May 31, 2026

Cerebellar Regional Dissection for Molecular Analysis
Published on: December 5, 2020
Three spinocerebellar ataxia type 2 siblings with ataxia, parkinsonism, and motor neuronopathy
Noriko Nishikawa1, Masahiro Nagai, Tomoaki Tsujii
1Department of Neurology and Clinical Pharmacology, Ehime University Hospital, Japan. n-nishi@m.ehime-u.ac.jp
Abstract:
Spinocerebellar ataxia type 2 (SCA2) represents a family of dominant neurodegenerative disorders that results from CAG expansion repeat mutations. The phenotype consists of some common features, most notably progressive ataxia. We describe three siblings with SCA2, manifesting parkinsonism and ataxia in the first sibling, juvenile parkinsonism in the second and motor neuronopathy in the third. Genetic examination revealed expansion to 42, 43, and 42 CAG repeats. There was no relationship between the number of repeats and phenotype. The SCA2 gene should be studied in families with heterogeneous neurodegenerative disorders, including motor neuron disease.
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